中国南方东部的大地构造背景控制着古地理演化特征，不同构造单元内沉积盆地的性质存在着显著差别。早三叠世的中下扬子混积盆地属克拉通边缘盆地，而上饶和明溪碎屑岩盆地则为大陆边缘断陷盆地。在整个三叠纪，区域性大断裂对沉积相的分布具有显著的控制作用。绍兴—宜春断裂作为构造分区的界限，控制了其两侧古地理的发展。古地理演化是构造运动的直观响应，中国南方三叠纪的地壳抬升、台地浅滩化、海水退出与印支运动密切相关 The tectonic setting in the eastern part of South China controls the paleogeographic evolution. There are significant differences in the nature of sedimentary basins in different tectonic units. The Middle Triassic Yangtze basin in the Early Triassic is a craton boundary basin, while the Shangrao and Mingxi clastic basins are marginal continental rift basins. Throughout the Triassic period, regional faults have a significant control over the distribution of sedimentary facies. The Shaoxing-Yichun fault, as the boundary of tectonic zoning, controls the development of palaeogeography on both sides. Paleogeographic evolution is an intuitive response to tectonic movement. Uplift of the crust in the Triassic in southern China, shallowening of the platform, and the exit of seawater are closely related to the Indosinian movement